Seiko Cal. 6639 - 401

The 6639-401 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 6639 caliber with 24j jewels beating at 21,600 bph, it delivers a 51 hours power reserve. [seikata-wm-f4ce3123f1fc]

Also known as: Panda

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

42mm

Case Thickness

10.9mm

Lug Width

18mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

190m

Dial Color

Burgundy

Jewels

24j

Frequency

21,600 bph

Power Reserve

51 hours

Year

1967

Related Models

• Seiko 6267-711
• Seiko 3877-775
• Seiko 6315-143
• Seiko 4486-870
• Seiko 6287-771
• Seiko 6311-928
• Seiko 6284-145
• Seiko 6224-910
• Seiko 6227-596
• Seiko 5615-798
• Seiko 0730-743
• Seiko 7089-318